Apparatus

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sensors Mode-S transponder

405BFD

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-YMMT · BOEING 777-200

Hex
405BFD
Octal
20055775
Decimal
4,217,853
Country
GB
Tail
G-YMMT
Type
B772
Broadcasting now · callsign BAW5VY · 38,000 ft
Flights observed
119
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Current position

405BFD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 405BFD falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
BAW142 British Airways 16 2026-05-09
BAW143 British Airways 14 2026-05-09
BAW118 British Airways 11 2026-05-28
BAW134 British Airways 9 2026-05-19
BAW119 British Airways 8 2026-05-27
BAW249 British Airways 7 2026-05-03
BAW248 British Airways 6 2026-05-03
BAW5VY British Airways 5 2026-05-29
BAW88C British Airways 4 2026-05-29
BAW265 British Airways 4 2026-05-25
BAW264 British Airways 4 2026-05-26
BAW181 British Airways 4 2026-04-14
BAW51B British Airways 3 2026-04-27
BAW50G British Airways 3 2026-04-26
BAW199 British Airways 3 2026-04-22
BAW198 British Airways 3 2026-04-23
BAW11J British Airways 3 2026-04-15
BAW7CP British Airways 2 2026-04-28
BAW6AC British Airways 2 2026-04-29
BAW46EZ British Airways 2 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BAW5VY LHR → YVR May 29, 16:45 UTCMay 29, 23:15 UTC6h 30m
2026-05-29 BAW88C YVR → LHR May 29, 04:50 UTCMay 29, 13:30 UTC8h 40m
2026-05-28 BAW5VY LHR → YVR May 28, 17:30 UTCMay 29, 02:40 UTC9h 10m
2026-05-28 BAW118 BLR → LHR May 28, 02:05 UTCMay 28, 12:45 UTC10h 40m
2026-05-27 BAW119 LHR → BLR May 27, 13:40 UTCMay 27, 22:55 UTC9h 15m
2026-05-27 BAW120 CVG → LHR May 27, 02:24 UTCMay 27, 09:40 UTC7h 15m
2026-05-26 BAW21V LHR → CVG May 26, 13:50 UTCMay 26, 21:49 UTC8h 0m
2026-05-26 BAW264 IAD → LHR May 26, 00:04 UTCMay 26, 10:14 UTC10h 10m
2026-05-25 BAW265 LHR → SAN May 25, 10:55 UTCMay 25, 21:45 UTC10h 50m
2026-05-23 BAW118 BLR → LHR May 23, 01:35 UTCMay 23, 12:00 UTC10h 24m
2026-05-22 BAW119 LHR → BLR May 22, 13:45 UTCMay 22, 23:20 UTC9h 35m
2026-05-19 BAW134 BOM → LHR May 19, 04:20 UTCMay 19, 13:45 UTC9h 25m
2026-05-18 BAW135 LHR → BOM May 18, 17:30 UTCMay 19, 02:25 UTC8h 54m
2026-05-18 BAW118 BLR → LHR May 18, 03:05 UTCMay 18, 12:30 UTC9h 25m
2026-05-17 BAW119 LHR → BLR May 17, 14:35 UTCMay 18, 00:10 UTC9h 35m
2026-05-17 BAW264 IAD → LHR May 17, 00:05 UTCMay 17, 09:55 UTC9h 50m
2026-05-16 BAW265 LHR → SAN May 16, 10:55 UTCMay 16, 21:35 UTC10h 40m
2026-05-15 BAW461 MAD → LHR May 15, 15:40 UTCMay 15, 17:40 UTC2h 0m
2026-05-15 BAW46EZ LHR → MAD May 15, 11:45 UTCMay 15, 13:25 UTC1h 40m
2026-05-13 BAW134 BOM → LHR May 13, 21:20 UTCMay 14, 16:25 UTC19h 5m
2026-05-13 BAW134 BOM → LHR May 13, 19:20 UTCMay 14, 16:25 UTC21h 5m
2026-05-13 BAW88C YVR → LHR May 13, 04:55 UTCMay 13, 13:45 UTC8h 50m
2026-05-12 BAW5VY LHR → YVR May 12, 16:55 UTCMay 13, 02:15 UTC9h 20m
2026-05-12 BAW118 BLR → LHR May 12, 12:10 UTCMay 12, 12:35 UTC25m
2026-05-11 BAW118 BLR → LHR May 11, 17:30 UTCMay 12, 12:05 UTC18h 35m
2026-05-11 BAW118 BLR → LHR May 11, 15:20 UTCMay 12, 12:05 UTC20h 46m
2026-05-11 BAW119 LHR → BLR May 11, 13:50 UTCMay 12, 12:05 UTC22h 16m
2026-05-11 BAW264 IAD → LHR May 11, 00:00 UTCMay 11, 10:20 UTC10h 20m
2026-05-10 BAW265 LHR → SAN May 10, 11:05 UTCMay 10, 21:35 UTC10h 30m
2026-05-09 BAW142 DEL → LHR May 9, 20:49 UTCMay 10, 06:00 UTC9h 10m
2026-05-09 BAW143 LHR → DEL May 9, 09:50 UTCMay 9, 17:55 UTC8h 5m
2026-05-07 BAW134 BOM → LHR May 7, 19:20 UTCMay 8, 14:40 UTC19h 20m
2026-05-07 BAW134 BOM → LHR May 7, 17:20 UTCMay 8, 14:40 UTC21h 20m
2026-05-07 BAW134 BOM → LHR May 7, 17:00 UTCMay 8, 14:40 UTC21h 39m
2026-05-07 BAW88C YVR → LHR May 7, 04:20 UTCMay 7, 13:20 UTC9h 0m
2026-05-06 BAW5VY LHR → YVR May 6, 16:55 UTCMay 7, 02:05 UTC9h 9m
2026-05-06 BAW118 BLR → LHR May 6, 07:05 UTCMay 6, 12:15 UTC5h 10m
2026-05-06 BAW118 BLR → LHR May 6, 01:35 UTCMay 6, 01:45 UTC10m
2026-05-05 BAW119 LHR → BLR May 5, 13:25 UTCMay 5, 23:00 UTC9h 35m
2026-05-05 BAW264 IAD → LHR May 5, 00:30 UTCMay 5, 10:45 UTC10h 15m
2026-05-04 BAW265 LHR → SAN May 4, 11:10 UTCMay 4, 22:05 UTC10h 56m
2026-05-03 BAW248 GIG → LHR May 3, 20:00 UTCMay 4, 06:20 UTC10h 20m
2026-05-03 BAW248 GIG → LHR May 3, 15:35 UTCMay 3, 17:54 UTC2h 20m
2026-05-03 BAW249 LHR → GIG May 3, 10:40 UTCMay 3, 13:35 UTC2h 55m
2026-05-02 BAW249 LHR → GIG May 2, 21:20 UTCMay 3, 08:45 UTC11h 24m
2026-05-01 BAW248 GIG → LHR May 1, 19:55 UTCMay 2, 06:35 UTC10h 40m
2026-05-01 BAW248 GIG → LHR May 1, 15:35 UTCMay 1, 18:00 UTC2h 25m
2026-05-01 BAW249 LHR → GIG May 1, 10:45 UTCMay 1, 13:35 UTC2h 50m
2026-05-01 BAW249 LHR → GIG May 1, 08:00 UTCMay 1, 08:15 UTC15m
2026-04-30 BAW249 LHR → GIG Apr 30, 21:05 UTCMay 1, 07:20 UTC10h 15m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the G-YMMT page for operator, model, and routing details .

Mode-S 405BFD frequently asked

What is Mode-S code 405BFD?
405BFD is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-YMMT.
Where is Mode-S 405BFD registered?
Mode-S code 405BFD is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 405BFD broadcasting right now?
Yes. Mode-S 405BFD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 405BFD, octal 20055775, decimal 4,217,853.
What flights does 405BFD operate?
Mode-S 405BFD has broadcast 20 distinct callsigns, including BAW142, BAW143, BAW118, BAW134, BAW119.